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# SecRequirementType

An enumeration indicating different types of internal requirements for code.

```
enum SecRequirementType
```

## Overview

These constants are indexes into requirement sets and are not currently used in any public API.

## Topics

### Constants

[`SecRequirementType.hostRequirementType`](/documentation/Security/SecRequirementType/hostRequirementType)

What hosts may run this code.

[`SecRequirementType.guestRequirementType`](/documentation/Security/SecRequirementType/guestRequirementType)

What guests this code may run.

[`SecRequirementType.designatedRequirementType`](/documentation/Security/SecRequirementType/designatedRequirementType)

A designated requirement.

[`SecRequirementType.libraryRequirementType`](/documentation/Security/SecRequirementType/libraryRequirementType)

What libraries this code may link against.

[`SecRequirementType.pluginRequirementType`](/documentation/Security/SecRequirementType/pluginRequirementType)

What plug-ins this code may load.

[`SecRequirementType.invalidRequirementType`](/documentation/Security/SecRequirementType/invalidRequirementType)

Invalid type of requirement.

[`requirementTypeCount`](/documentation/Security/SecRequirementType/requirementTypeCount)

The number of valid requirement types.


---

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